/* 以下就是类型注解：类型注解就是给变量添加类型的约束*/
const a: boolean = true
const b: string = ""
const c: number = 1
const d: null = null
const e: undefined = undefined
const array: number[] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
console.log(a,b,c,d,e,array)
